Small Block ID
 

I bought a 68 small block from a good friend. He was not sure what it is. Came out of a 68 Malibu convertible. ID # is 3914638. It comes up as both a 307 and a 327 on various sites. Anyone have a history of knowledge about what it going on?

Besides pulling the head to measure, I'm not sure where or even if I need to go with this.

Re: Small Block ID
 

Looks like it could be either...pull a head and measure...

Re: Small Block ID
 

Get the other letters/numbers off the pad in front of the passenger side head.
That info will help narrow it down.

Re: Small Block ID
 

Looks like a 307

3834810....283...64-66...2
3834812....283...62-63...2
3837739....283...58-62...2
3849852....283...57-66...2
3849935....283...65-67...2
3858174....327...64-67...2
3858180....327...64-67...2
3858618....350...68-76...2
3862194....283...65-67...2...Chevy II recessed oil filter boss
3862812....283...62-64...2
3892657....302.....67....2...Z-28 Camaro
3892657....327.....67....2
3892657....350.....67....2...Camaro
3896944....283...66-67...2
3896948....283...66-67...2
3903352....327.....67....2
3914636....307.....68....2
3914638....307.....68....2 <<<<<<<< Here<<<<<<<<<<<
3914653....307...68-73...2
3914660....327.....68....2
3914678....302.....68....2...Z-28 Camaro
3914678....327.....68....2
3914678....350.....68....2
3931174....307.....68....2...Truck
3932371....307...69-73...2
3932373....307...68-73...2
3932386....302.....69....4...Z-28 Camaro
3932386....327.....69....2
3932386....350.....69....2 or 4
3932388....327.....69....2
3932388....350.....69....2 or 4
3933180....327...68-6